Java™ Application Development on Linux - Dator

2.2 Eye to Eye with vi431,$s/Tryout/Sample/gWill make the substitution in that method name.TIPRemember to precede these commands with a colon (“:”) to put you into exmode which puts your cursor on the status bar of the window.2.2.3 The Joy of Regular ExpressionsThe substitution command really becomes powerful when you start using regularexpressions. Our examples so far have only had plain alphanumeric charactersbetween the slashes of the substitution. But other characters take on specialmeanings inside the search and replace strings. Table 2.1 shows just a few.From this small collection we can do some useful things. We show just afew in Table 2.2. All commands begin with :1,$ to say that the substitutionwill be attempted from the first through the last line of the file. 3 You could usea smaller range for any of these substitutions, as we discussed above.Table 2.1 Regular expression character meaningsCharacter^$.*+[]&MeaningThe beginning of the line.The end of the line.Any single character.Zero or more repetitions of the previous expression.One or more repetitions of the previous expression.Any of the characters inside the brackets will match—e.g., [abc] matches anyof a, b, c. Ranges are allowed too—e.g., [a-z].When used on the right-hand side, stands for whatever was found with thesearch string on the left-hand side (for an example, see Table 2.2).3. Note that % is valid substitute for 1,$.